Question

If a barometer records a sudden fall in pressure without an appreciable rise in temperature, it implies that the weather will be:

• A. Fair weather
• B. Dry weather
• C. Dust storm
• D. Rain storm

Answer 1

The correct option is D

Rain storm

Explanation for the correct option

1. Atmospheric pressure decreases with an increase in temperature and moisture content of the air.
2. Since there is no appreciable rise in temperature, it indicates that the sudden fall in pressure is due to the presence of moisture in the air.
3. A rainy storm has moisture in abundance.
4. Clearly, a sudden fall in pressure indicates that there is a rainstorm.

Explanation for the incorrect options

1. If the pressure is normal, it indicates that the weather is fair.
2. If there is a sudden rise in the pressure, it indicates that the weather is dry.
3. If there is a fall in pressure due to the increase in temperature (without any increase in moisture content), it indicates a dust storm.

Hence, option (d) will be correct.